Fleece is not expensive, kind of environmental friendly and makes a great blanket!
Step 1: Preparing the patterns' templates
The great thing with fleece if that it's rather easy to mark the pattern with chalk (at least on the left side), and there's no need for hems as fleece does not fray. So no need to leave space for hems. Just mark it and cut it on the mark.
I used two colors for the patterns, and two colors for the blanket.
Step 2: Align the patterns on the blanket
I've decided to go for the swirl, but after marking the entire blanket, I've found out that the markings fades very quickly. By the time I got to sew the third car it was all gone. Having a picture was very useful.